Phytologia (February 1996) 80(2).73-91 REVISION DE BOUTELOUA BARBATA LAGASCA (POACEAE: ERAGROSTIDEAE) Sandra Esparza Sandoval Centre Bdsico, Universidad Aut6noma de Aguascalientes, Avenida Universidad s/n, Aguascalientes, Ags., 20100 MEXICO & Yolanda Herrera Arrieta CIIDIR Unidad Durango, Instituto Polit&nico NacionaJ, Apartado Postal 57. Durango, Dgo., C.P. 34000 MEXICO Becaria de la COFAA RESUMEN Se revisan los taxa infraespecfficos de Bouteloua barbata; se analizan los caracteres anat6micos en la epidermis abaxial de Idminas foliares y en secciones transversales de Idmina foliar, vaina y tallo de estos taxa, cx)n el fin de observar las variaciones infraespecfficas. Se reconsideran los caracteres morfolbgicos que delimitan los taxa y se plantea una clave para la separacion de variedades. PALABRAS CLAVE: Bouteloua barbata, Poaceae, anatomia, taxonomia ABSTRACT The infraspecific taxa of Bouteloua barbata are revised; anatomical features from their leaf abaxial epidermis and transverse sections of leaves, sheaths and culms were analyzed in order to observe the infraspecific anatomical variation. Morphological characters were reconsidered and a key was proposed lo separate the varieties of this species. KEY WORDS: Bouteloua barbata, Poaceae, anatomy, taxonomy 73
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